[time-nuts] DSAC launches tonight
jimlux
jimlux at earthlink.net
Mon Jun 24 17:21:05 UTC 2019
https://www.jpl.nasa.gov/news/news.php?feature=7430
and, as well, COSMIC-2 is being deployed - 6 satellites each carrying a
fancy GPS receiver that does two things: Precision Orbit Determination
(POD) using a choke ring antenna; Occultation measurements of the
atmosphere using a directive array of helical antennas facing the limb.
https://twitter.com/AF_SMC/status/1141099481628364808 has a nice view of
the COSMIC-2 satellites - they're in the middle and you can see the 12
element array. Yes, I suspect that the dimensions of the form for the
helix are very close to that of a standard small Solo drink cup, but
these are a fancy 3D printed material that can stand up to radiation and
atomic oxygen.
These spacecraft fly with the array antennas pointed at the limb
More information about the Time-nuts_lists.febo.com
mailing list